 Today is expected to be the busiest day ever at U.S. airports. TSA expects over 3 million people to go through airport security checkpoints. Oddly, last Sunday broke the all-time record, beating all pre-Thanksgiving, Christmas, and 4th of July periods. AAA expects 60 million Americans to drive on a trip over the 4th of July period. Aexa Diaz is with AAA. The only thing you can't control is the traffic. AAA says Seattle, Orlando, and Anchorage are the top 4th of July destinations. ABC's Alex Stone.